25380391 has 4 divisors (see below), whose sum is σ = 25631784. Its totient is φ = 25129000.

The previous prime is 25380389. The next prime is 25380401. The reversal of 25380391 is 19308352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25380391 - 2¹ = 25380389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25380361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125545 + ... + 125746.

It is an arithmetic number, because the mean of its divisors is an integer number (6407946).

Almost surely, 2^25380391 is an apocalyptic number.

25380391 is a deficient number, since it is larger than the sum of its proper divisors (251393).

25380391 is a wasteful number, since it uses less digits than its factorization.

25380391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251392.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 25380391 is about 5037.8954931598. The cubic root of 25380391 is about 293.8773417408.

The spelling of 25380391 in words is "twenty-five million, three hundred eighty thousand, three hundred ninety-one".